Half Life Formula & Example

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Learn the formula for half life as well as see an example in this free math video tutorial by Mario's Math Tutoring.
0:09 Formula for Calculating Half Life
0:38 Example 1 Story (Word) Problem
1:21 Taking the Logarithm of Both Sides to Solve For t
2:05 Using Change of Base Formula
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Опубликовано:

17 ноя 2016

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Комментарии : 91

@elmer5968 6 лет назад

This was so helpful. Thank you for efficiently explaining this and using an example. Perfect video.

@MariosMathTutoring 6 лет назад

Thanks Elmer! Glad you liked it!

@cgreer457 3 года назад

Wow, a video that finally helps me understand. Thank you!

@ObisStuff 3 года назад

Half Life 3 confirmed

@holaguys2832 Год назад

Yes

@aolmsn 9 месяцев назад

This guy it's a Black Mesa scientist

@jaxondoering3252 3 года назад

This helped me out sooooo much. Can't thank you enough.

@arielbryant9410 2 года назад

Than k you so much. You have no idea how long I have been trying to figure this out and checking different websites and videos. I have been struggling with math this year and usually I pick it up fast. I just had a moment of OH MY GOD I did it!

@notgarcian 3 года назад

made it looked so simple, thanks for the help :)

@FaultyRedstone95 5 лет назад

Thank you! This was exactly what I needed.

@MariosMathTutoring 5 лет назад

Glad my video helped you!

@reembeem1725 2 года назад

may god bless your heart, wonderful teaching method

@soohyeonpyo9034 5 лет назад

Thank you so much for the efficient video:)

@MariosMathTutoring 5 лет назад

You’re welcome Pyo Aimee!

@OShawna23 5 месяцев назад

Thanks for helping me with my MCAT math ❤🎉

@MariosMathTutoring 5 месяцев назад

You're welcome! Good luck!

7 месяцев назад

This has been great for me, I have struggled for hours and it is just perfect. i will be looking for more... Thank you

@MariosMathTutoring 7 месяцев назад

Glad it helped!

@akinbamiolorunnifemi9813 4 года назад

This was really helpful

@mewmew8755 4 года назад

Thank you so much! This helped so much!!

@MariosMathTutoring 4 года назад

Glad my half-life Video helped you Layla!

@miaparagas3847 3 года назад

thanks. that was helpful

@Asmrssss 3 года назад

Best simple explanation I’ve ever heard!

@temilayotobidavid 2 года назад

Thank you

@abundanthouseofgrace1273 4 года назад

Thanks so much. it was really helpful.

@MariosMathTutoring 4 года назад

You’re welcome!

@EmperorSteel 3 месяца назад

This has helped a ton. I think I struggled with computing it, but after finally trying, I got to the same conclusion. Thanks for your help

@MariosMathTutoring 3 месяца назад

Glad it helped!

@seanhendricks5389 4 года назад

Great video!

@MariosMathTutoring 4 года назад

Glad you liked the video Sean!

@turntechhh 7 месяцев назад

thank you so so much!!!! now i feel much more prepared for my test tomorrow :-)

@MariosMathTutoring 7 месяцев назад

Best of luck!

@elflonghand5056 6 месяцев назад

Thank you this helped a lot for my test tomorrow!

@MariosMathTutoring 6 месяцев назад

Best of luck!

@llllll6133 4 года назад

Thank you!!!

@MariosMathTutoring 4 года назад

You’re welcome!

@heat4 3 года назад

That was easy, thank u. (from india)

@m41_doggy62 Год назад

Yes2x thank you Soo much sir for helping find another solution for solving it, because my scientific calculator doesn't have the ability of that other log. YAY I'm gonna ace my test on monday

7 месяцев назад

Thanks!

@MariosMathTutoring 7 месяцев назад

Thanks for the super thanks!

@rizv10 Год назад

How would you find the half life, given every other variable? Would you multiply time with mass?

@sonusingh-ix8yx 4 года назад

Hey I'm from India I really impressed your teaching style 👌

@MariosMathTutoring 4 года назад

Glad you like my teaching style Sonu!

@hanaschannel3187 4 года назад

It helped me a LOT

@MariosMathTutoring 4 года назад

Glad my video helped you Hana!

@hanaschannel3187 4 года назад

Thank you so much 😊

@nelsona445 4 года назад

Thanks mario

@MariosMathTutoring 4 года назад

You’re welcome nelsona!

@alexiscolicelli8130 3 года назад

Prepárate para consecuencias imprevistas eso entendí

@vedhamara6748 Год назад

Thanks for actually giving an explanation unlike my teacher

@danparongj8765 Год назад

How do we know that half time of uranium 238 is 4.5 billion years , given that there was no person during that time to measure the initial mass of the uranium sample used to determine it's half life?

@erfanpsalehis1852 Год назад

quick question wouldn't the 20 days be in SI unit?

@lynnmungai Год назад

Lovely

@mariahdougherty886 4 года назад

How would one calculate the natural log WITHOUT calculator?

@princesykkuno5295 2 года назад

thats what I be wondering

@huyanhle Год назад

Hi Mario and everyone, Could you please help me with this following question Radioactive materials are considered to be relatively safe when their activity has fallen below 0.1% of their initial value. (a) How much half-lives does this take? (Answer = 10 half-lives) (b) Plutonium-239 is a by product of nuclear reactors. Its half-life is 24 000 years. How long does the plutonium-239 have to be stored as nuclear waste before it is considered safe to handle? (Answer - 240 000 years)

@MrsRoyski713 2 года назад

.10 divided by .5 multiplied by 20= 4 on my calculator. Please explain!

@yashpalthakur3526 4 года назад

Can you please derive this formula.

@seg_kook8296 2 года назад

But how do you find the half life when ur given everything else

@johnnyJims31174 2 года назад

So how do we know that the rate of decay never changes? Like how do we know that 1,000 years from now the rate of decay doesn’t change?

@S.ShepherdXO 5 лет назад

Hello Sir, I wanted to ask you how you got the 0.10 because I'm having some trouble on my calculator?

@MariosMathTutoring 5 лет назад

Zuma, start by dividing both sides of the equation by 100. 10/100 = 0.10

@shaynemaratas9055 3 года назад

THANKYOUUUUUUU

@tragedy2722 3 года назад

By any chance can u help me with a half life problem I don’t understand lol

@ff-qf1th 3 года назад

@@tragedy2722 lol

@amaanisirajuddin2293 3 года назад

is the natural log the name as log(base 10)? I heard the change of base rule explained a different way

@Racerdew 3 года назад

Ln has a base of e. So just like log(10)=1 Ln(e)=1

@SkyLLer5971 3 месяца назад

Gordon doesn't need to hear all this he's a highly trained professional

@td9250 3 года назад

Damn, I estimated 65 days. x)

@matthewmea3566 2 года назад

Gordon Freeman

@wanasfa 3 года назад

i clicked on the video cus the dude on the thumbnail looked so happy

@bhairusinghshekhawat3469 4 года назад

Do you know about hindi

@MN-53 3 года назад

Ana alsbe3e 3mk ya alh6f yalah ingl3 ant wa alfezia elly ma mnha faida

@obendesmond 3 года назад

I get 6 days, how come you get 66 Sir Mario, Please check it again

@ukkuthegreat 3 года назад

But this isnt half life,, your doing math I dont understand it I thought it was videogame?? Whats the name then what Im so confused pls help!!1

@ColoradonCT 3 года назад

is the job of doctor freeman

@ff-qf1th 3 года назад

you're very funny good job

@samsamson1414 5 лет назад

You are the best though too fast but I slow the video down. Thank u sir

@MariosMathTutoring 5 лет назад

Glad to hear you like my videos Sam! Also glad to hear you were able to adjust the playback setting to a good speed for you to get the most out of the lessons.